Kelly Osbourne is heartbroken.

The 26-year-old star launched an angry tirade against former fiance Luke Worral on twitter yesterday (28.12.10) and has now revealed she plans to quit the microblogging website in order to give herself space to deal with her feelings.

She posted: "Dont think I have ever felt so stupid he made a fool of me going to be off Twitter for a while never felt heart brake like this in my life. (sic)"

Kelly's tirade came after she revealed Luke - who she split from in July amid rumours he had cheated on her - wanted a reconciliation, only for her to later apparently discover he had been unfaithful multiple times.

She tweeted: "What do you do when someone lies in the darkest way and you try to tell the person that was lied 2 but they don't believe you? (sic)"

Her scathing attack then began, with her writing: "@Luke_worrall is the biggest piece of s**t he has been trying to get back w/ me I only came home for Xmas to see him meanwhile he has been . F***ing 100's of girls as well as men behind my back all he did was use me all girls beware of @Luke_worral he is a using ****!

"He used me for my money and a free ride he is lucky I am not spilling the hole truth about what he did !

"He is the worst thing that ever happened to me I don't give a f***k what happens to him anymore . I am and always will be 2 good 4 @luke_worrall darling ur pretty face will only get you so far because u don't have the brains to back it up. (sic)"

Luke - who celebrated his 21st birthday on Sunday (26.12.10) - refused to respond to the messages.

He simply wrote: "Lies on Twitter awesome. (sic)"

When he was later asked if he had anything to say to Kelly, he posted: "No because im not going to spill personal business over twitter im not that low! (sic)"